| 摘要 |
<p>A method for determining the efficacy of water-soluble polymers for reducing the concentration of colloidal pitch particles in aqueous pulps which comprises the steps of: (a) filtering a portion of a pulp sample to remove the fibers therefrom under conditions of agitation which corresponds to the approximate degree of agitation of the pulp in the papermaking system and collecting the filtrate; (b) counting the colloidal pitch particles in the filtrate in a hemacytometer, thereby establishing a blank count value for the untreated pulp, (c) treating another portion of the same pulp sample with a watersoluble cationic polymer and repeating steps (a) and (b), and then (d) comparing the colloidal pitch count of the treated sample against the blank to determine the degree of colloidal pitch particle reduction.</p> |
